SOHO/LASCO CME Catalog

CME heights (with respect to the disk center) are measured at the fastest segment of the leading edge.

PA= Position Angle measured from Solar North in degrees (counter-clockwise)

Halo CMEs are indicated in the "Central PA" column. The letters ("S", "BA", "OA") in the brackets show type of halo CMEs. See examples.

Click on date to view Java script movie of the CME.

Click on time to see height-time measurements as a text file.

Click on speed to view height-time plots of the CME.

Beware of data gaps. Check for LASCO/C2 data gaps here.

A complete description of the catalog

Click here to search the entire catalog.

First C2 Appearance
Date Time [UT] Central
PA
[deg] Angular
Width [deg] Linear
Speed [km/s] 2nd-order Speed at final height [km/s] 2nd-order Speed at 20 Rs [km/s] Accel
[m/s²] Mass
[gram] Kinetic
Energy
[erg] MPA [deg] Movies, plots, & links Remarks

1997/09/05 23:03:13 110 81 361 440 360 10.5 3.6e+14 2.3e+29 99 C2 195 SXT PHTX DST Java Movie Only C3

1997/09/08 03:09:36 228 72 115 87 0 -6.5^*1 6.1e+13 4.0e+27 243 C2 C3 195 SXT PHTX DST Java Movie Very Poor Event; Only C2

1997/09/09 00:29:29 259 77 342 268 0 -14.1^*1 3.5e+14 2.1e+29 264 C2 C3 195 SXT PHTX DST Java Movie

1997/09/09 02:41:23 107 92 240 270 435 6.4^*1 1.4e+14 3.9e+28 112 C2 C3 195 SXT PHTX DST Java Movie

1997/09/09 20:06:02 284 101 726 635 692 -7.4 3.4e+15 9.1e+30 303 C2 C3 195 SXT PHTX DST Java Movie

1997/09/10 17:13:01 110 60 ---- --- --- --- ---- ---- 103 C2 C3 195 SXT PHTX DST Java Movie Very Poor Event; Only C2; Unable to measure

1997/09/13 11:33:34 87 46 418 267 0 -35.4^*1 2.1e+14^*2 1.8e+29^*2 87 C2 C3 195 SXT PHTX DST Java Movie Poor Event

1997/09/13 17:50:05 298 46 170 199 337 4.1^*1 2.1e+14 3.0e+28 292 C2 C3 195 SXT PHTX DST Java Movie UVCS Poor Event

1997/09/15 09:53:05 253 50 136 207 493 10.4^*1 2.2e+14 2.1e+28 258 C2 C3 195 SXT PHTX DST Java Movie Very Poor Event; Only C2

1997/09/16 04:20:05 78 72 252 284 334 2.6 1.1e+15 3.6e+29 75 C2 C3 195 SXT PHTX DST Java Movie

1997/09/17 11:34:05 259 68 447 460 493 2.3^*1 5.2e+14 5.2e+29 269 C2 C3 195 SXT PHTX DST Java Movie Poor Event

1997/09/17 12:26:05 268 56 232 160 0 -13.6 ---- ---- 269 C2 C3 195 SXT PHTX DST Java Movie Newly inserted on 2008/11/14

1997/09/17 18:18:06 269 46 613 --- --- --- ---- ---- 270 C2 C3 195 SXT PHTX DST Java Movie Only 2 points; Only C2

1997/09/17 20:28:48 Halo (OA) 360 377 377 377 -0.0 2.6e+15^*2 1.9e+30^*2 263 C2 C3 195 SXT PHTX DST Java Movie Only C3

1997/09/18 06:35:05 303 20 374 411 466 4.4 ---- ---- 297 C2 C3 195 SXT PHTX DST Java Movie

1997/09/18 16:53:07 270 38 112 --- --- --- ---- ---- 275 C2 C3 195 SXT PHTX DST Java Movie Newly inserted on 2006/01/09; Poor Event; Only 2 points; Only C2

1997/09/18 18:03:07 267 55 285 166 0 -48.3^*1 ---- ---- 268 C2 C3 195 SXT PHTX DST Java Movie Only 3 points; Only C2

1997/09/18 20:20:06 275 44 343 --- --- --- ---- ---- 267 C2 C3 195 SXT PHTX DST Java Movie Very Poor Event; Only 2 points; Only C2

1997/09/19 01:29:06 281 28 240 173 0 -9.2^*1 ---- ---- 280 C2 C3 195 SXT PHTX DST Java Movie UVCS Revised on 2006/01/09

1997/09/19 02:30:05 265 46 272 134 0 -26.2 ---- ---- 272 C2 C3 195 SXT PHTX DST Java Movie Revised on 2006/01/09

1997/09/19 04:20:05 265 77 251 366 510 9.7 ---- ---- 257 C2 C3 195 SXT PHTX DST Java Movie Revised on 2006/01/09

1997/09/19 18:03:05 95 43 282 224 0 -5.5 4.5e+14 1.8e+29 91 C2 C3 195 SXT PHTX DST Java Movie

1997/09/20 00:44:22 246 39 522 508 515 -1.0 7.6e+14 1.0e+30 247 C2 C3 195 SXT PHTX DST Java Movie

1997/09/20 03:38:05 241 15 472 209 0 -33.7^*1 ---- ---- 242 C2 C3 195 SXT PHTX DST Java Movie Newly inserted on 2006/01/09

1997/09/20 10:20:05 272 97 777 827 803 5.0 4.9e+15 1.5e+31 268 C2 C3 195 SXT PHTX DST Java Movie

1997/09/20 16:53:06 82 54 ---- --- --- --- ---- ---- 76 C2 C3 195 SXT PHTX DST Java Movie Newly inserted on 2006/01/09; Poor Event; Only 1 point; Only C2

1997/09/22 07:29:05 255 46 353 469 737 21.4^*1 1.9e+14 1.2e+29 251 C2 C3 195 SXT PHTX DST Java Movie Poor Event

1997/09/22 09:26:50 72 84 287 372 874 31.6^*1 3.1e+14^*2 1.3e+29^*2 65 C2 C3 195 SXT PHTX DST Java Movie Poor Event; Only C2

1997/09/22 12:00:05 90 69 277 269 260 -0.6 2.0e+15 7.5e+29 91 C2 C3 195 SXT PHTX DST Java Movie

1997/09/23 22:02:10 133 155 712 803 761 8.2 3.9e+15^*2 9.9e+30^*2 116 C2 C3 195 SXT PHTX DST Java Movie Partial Halo

1997/09/24 03:38:05 137 76 532 676 899 30.3^*1 ---- ---- 117 C2 C3 195 SXT PHTX DST Java Movie

1997/09/24 04:20:05 275 41 202 170 0 -7.9^*1 ---- ---- 271 C2 C3 195 SXT PHTX DST Java Movie Only C2

1997/09/24 08:06:05 161 53 161 299 454 8.8 ---- ---- 160 C2 C3 195 SXT PHTX DST Java Movie

1997/09/24 12:26:06 94 52 352 351 350 -0.1^*1 ---- ---- 103 C2 C3 195 SXT PHTX DST Java Movie Newly inserted on 2005/12/21

1997/09/27 04:44:04 60 14 277 334 678 17.0^*1 ---- ---- 63 C2 C3 195 SXT PHTX DST Java Movie

1997/09/27 09:09:47 62 23 436 487 577 7.8 ---- ---- 67 C2 C3 195 SXT PHTX DST Java Movie

1997/09/27 13:16:13 276 45 80 102 187 1.4^*1 ---- ---- 275 C2 C3 195 SXT PHTX DST Java Movie Poor Event

1997/09/28 01:08:33 Halo (S) 360 359 404 409 2.8 4.0e+15^*2 2.6e+30^*2 87 C2 C3 195 SXT PHTX DST Java Movie

1997/09/28 08:40:43 84 60 529 624 573 5.5 5.6e+15 7.8e+30 74 C2 C3 195 SXT PHTX DST Java Movie

1997/09/28 14:28:15 93 85 579 397 0 -25.8 3.1e+15 5.1e+30 71 C2 C3 195 SXT PHTX DST Java Movie

1997/09/28 14:50:11 287 46 102 169 726 22.2^*1 ---- ---- 284 C2 C3 195 SXT PHTX DST Java Movie Poor Event; Only C2

1997/09/28 15:50:20 257 41 640 793 747 13.1 1.3e+15 2.7e+30 266 C2 C3 195 SXT PHTX DST Java Movie UVCS

1997/09/29 10:18:04 77 44 237 272 706 19.1^*1 ---- ---- 74 C2 C3 195 SXT PHTX DST Java Movie Only C2

1997/09/29 15:46:37 75 55 699 805 791 11.6 3.3e+15 8.0e+30 74 C2 C3 195 SXT PHTX DST Java Movie

1997/09/29 18:30:56 78 99 369 391 421 2.5 3.4e+15 2.3e+30 63 C2 C3 195 SXT PHTX DST Java Movie

First C2 Appearance Date Time [UT]	Central PA [deg]	Angular Width [deg]	Linear Speed [km/s]	2nd-order Speed at final height [km/s]	2nd-order Speed at 20 Rs [km/s]	Accel [m/s²]	Mass [gram]	Kinetic Energy [erg]	MPA [deg]	Movies, plots, & links	Remarks
1997/09/05	23:03:13	110	81	361	440	360	10.5	3.6e+14	2.3e+29	99	C2 195 SXT PHTX DST Java Movie	Only C3
1997/09/08	03:09:36	228	72	115	87	0	-6.5^*1	6.1e+13	4.0e+27	243	C2 C3 195 SXT PHTX DST Java Movie	Very Poor Event; Only C2
1997/09/09	00:29:29	259	77	342	268	0	-14.1^*1	3.5e+14	2.1e+29	264	C2 C3 195 SXT PHTX DST Java Movie
1997/09/09	02:41:23	107	92	240	270	435	6.4^*1	1.4e+14	3.9e+28	112	C2 C3 195 SXT PHTX DST Java Movie
1997/09/09	20:06:02	284	101	726	635	692	-7.4	3.4e+15	9.1e+30	303	C2 C3 195 SXT PHTX DST Java Movie
1997/09/10	17:13:01	110	60	----	---	---	---	----	----	103	C2 C3 195 SXT PHTX DST Java Movie	Very Poor Event; Only C2; Unable to measure
1997/09/13	11:33:34	87	46	418	267	0	-35.4^*1	2.1e+14^*2	1.8e+29^*2	87	C2 C3 195 SXT PHTX DST Java Movie	Poor Event
1997/09/13	17:50:05	298	46	170	199	337	4.1^*1	2.1e+14	3.0e+28	292	C2 C3 195 SXT PHTX DST Java Movie UVCS	Poor Event
1997/09/15	09:53:05	253	50	136	207	493	10.4^*1	2.2e+14	2.1e+28	258	C2 C3 195 SXT PHTX DST Java Movie	Very Poor Event; Only C2
1997/09/16	04:20:05	78	72	252	284	334	2.6	1.1e+15	3.6e+29	75	C2 C3 195 SXT PHTX DST Java Movie
1997/09/17	11:34:05	259	68	447	460	493	2.3^*1	5.2e+14	5.2e+29	269	C2 C3 195 SXT PHTX DST Java Movie	Poor Event
1997/09/17	12:26:05	268	56	232	160	0	-13.6	----	----	269	C2 C3 195 SXT PHTX DST Java Movie	Newly inserted on 2008/11/14
1997/09/17	18:18:06	269	46	613	---	---	---	----	----	270	C2 C3 195 SXT PHTX DST Java Movie	Only 2 points; Only C2
1997/09/17	20:28:48	Halo (OA)	360	377	377	377	-0.0	2.6e+15^*2	1.9e+30^*2	263	C2 C3 195 SXT PHTX DST Java Movie	Only C3
1997/09/18	06:35:05	303	20	374	411	466	4.4	----	----	297	C2 C3 195 SXT PHTX DST Java Movie
1997/09/18	16:53:07	270	38	112	---	---	---	----	----	275	C2 C3 195 SXT PHTX DST Java Movie	Newly inserted on 2006/01/09; Poor Event; Only 2 points; Only C2
1997/09/18	18:03:07	267	55	285	166	0	-48.3^*1	----	----	268	C2 C3 195 SXT PHTX DST Java Movie	Only 3 points; Only C2
1997/09/18	20:20:06	275	44	343	---	---	---	----	----	267	C2 C3 195 SXT PHTX DST Java Movie	Very Poor Event; Only 2 points; Only C2
1997/09/19	01:29:06	281	28	240	173	0	-9.2^*1	----	----	280	C2 C3 195 SXT PHTX DST Java Movie UVCS	Revised on 2006/01/09
1997/09/19	02:30:05	265	46	272	134	0	-26.2	----	----	272	C2 C3 195 SXT PHTX DST Java Movie	Revised on 2006/01/09
1997/09/19	04:20:05	265	77	251	366	510	9.7	----	----	257	C2 C3 195 SXT PHTX DST Java Movie	Revised on 2006/01/09
1997/09/19	18:03:05	95	43	282	224	0	-5.5	4.5e+14	1.8e+29	91	C2 C3 195 SXT PHTX DST Java Movie
1997/09/20	00:44:22	246	39	522	508	515	-1.0	7.6e+14	1.0e+30	247	C2 C3 195 SXT PHTX DST Java Movie
1997/09/20	03:38:05	241	15	472	209	0	-33.7^*1	----	----	242	C2 C3 195 SXT PHTX DST Java Movie	Newly inserted on 2006/01/09
1997/09/20	10:20:05	272	97	777	827	803	5.0	4.9e+15	1.5e+31	268	C2 C3 195 SXT PHTX DST Java Movie
1997/09/20	16:53:06	82	54	----	---	---	---	----	----	76	C2 C3 195 SXT PHTX DST Java Movie	Newly inserted on 2006/01/09; Poor Event; Only 1 point; Only C2
1997/09/22	07:29:05	255	46	353	469	737	21.4^*1	1.9e+14	1.2e+29	251	C2 C3 195 SXT PHTX DST Java Movie	Poor Event
1997/09/22	09:26:50	72	84	287	372	874	31.6^*1	3.1e+14^*2	1.3e+29^*2	65	C2 C3 195 SXT PHTX DST Java Movie	Poor Event; Only C2
1997/09/22	12:00:05	90	69	277	269	260	-0.6	2.0e+15	7.5e+29	91	C2 C3 195 SXT PHTX DST Java Movie
1997/09/23	22:02:10	133	155	712	803	761	8.2	3.9e+15^*2	9.9e+30^*2	116	C2 C3 195 SXT PHTX DST Java Movie	Partial Halo
1997/09/24	03:38:05	137	76	532	676	899	30.3^*1	----	----	117	C2 C3 195 SXT PHTX DST Java Movie
1997/09/24	04:20:05	275	41	202	170	0	-7.9^*1	----	----	271	C2 C3 195 SXT PHTX DST Java Movie	Only C2
1997/09/24	08:06:05	161	53	161	299	454	8.8	----	----	160	C2 C3 195 SXT PHTX DST Java Movie
1997/09/24	12:26:06	94	52	352	351	350	-0.1^*1	----	----	103	C2 C3 195 SXT PHTX DST Java Movie	Newly inserted on 2005/12/21
1997/09/27	04:44:04	60	14	277	334	678	17.0^*1	----	----	63	C2 C3 195 SXT PHTX DST Java Movie
1997/09/27	09:09:47	62	23	436	487	577	7.8	----	----	67	C2 C3 195 SXT PHTX DST Java Movie
1997/09/27	13:16:13	276	45	80	102	187	1.4^*1	----	----	275	C2 C3 195 SXT PHTX DST Java Movie	Poor Event
1997/09/28	01:08:33	Halo (S)	360	359	404	409	2.8	4.0e+15^*2	2.6e+30^*2	87	C2 C3 195 SXT PHTX DST Java Movie
1997/09/28	08:40:43	84	60	529	624	573	5.5	5.6e+15	7.8e+30	74	C2 C3 195 SXT PHTX DST Java Movie
1997/09/28	14:28:15	93	85	579	397	0	-25.8	3.1e+15	5.1e+30	71	C2 C3 195 SXT PHTX DST Java Movie
1997/09/28	14:50:11	287	46	102	169	726	22.2^*1	----	----	284	C2 C3 195 SXT PHTX DST Java Movie	Poor Event; Only C2
1997/09/28	15:50:20	257	41	640	793	747	13.1	1.3e+15	2.7e+30	266	C2 C3 195 SXT PHTX DST Java Movie UVCS
1997/09/29	10:18:04	77	44	237	272	706	19.1^*1	----	----	74	C2 C3 195 SXT PHTX DST Java Movie	Only C2
1997/09/29	15:46:37	75	55	699	805	791	11.6	3.3e+15	8.0e+30	74	C2 C3 195 SXT PHTX DST Java Movie
1997/09/29	18:30:56	78	99	369	391	421	2.5	3.4e+15	2.3e+30	63	C2 C3 195 SXT PHTX DST Java Movie

*1 Acceleration is uncertain due to either poor height measurement or a small number of height-time measurements (See Section 3.4 of Yashiro et al. 2004 for details).
*2 Mass and Kinetic Energy are uncertain due to poor mass estimate. Mass measurement assumes that the CME material is in the sky-plane. Kinetic Energy is obtained from the mass and linear speed (see Vourlidas et al. 2000 for details).